Rocket,
Perhaps this will give you some ideas and help.
If you have been laying hints, expressing your values of fidelity, love, caring and giving.. with her reactions of her taking her secret into far being more careful.. fingerprint her phone. It does not sound like she will confess. Take some pride in yourself for giving her an opportunity to be more open with you.
It is OK to accept that. Your good will come in time. This will only be temporary pain.
Perhaps you should now begin a plan of what you are going to say and do when you confront.
If it were me, I would go ahead and get my legal stuff in order first. Totally with jjct's post. An evil woman in fear will take all your money quickly. And yes, she is living her life in evil right now.
Completely read the 180 behaviors and make sure you follow each and every one. Be ready. Because for some odd reason, when you stand strong, she most likely will find that most attractive. She might try and use sex to lure you back. And that is fine, but until you know for sure she wants a marriage not based in only sex, or tricks, lies, but rather only in all the loves, she cannot be worthy of you unless complete honesty now. You will be presenting her from a standpoint of strenght and good values.
I am not big on following or tracking. It is too much work and wears on your mental health. Let someone else you hire do that work and just give you a report if you must know. It will be worth the dollars. It really does not matter who.. It matters she already is this person and you already know.
If you take an attitude of being.. I am worthy of being treated fairly and I will eliminate anyone in my life who is not worthy of joining in my own happiness. I accept life is not always fair. But I can dust myself off and change.
IMO, A good strong man will just lay the papers down for her to sign or at he least say this is our end.
Perhaps with a comment like this. Wife, my value is fidelity. This document is your choice, not mine. I am sorry you make this choice. It is not the choice I wanted for me, our kids, our friends and family. (A bone, a flickr of hope, love always hopes, if you can handle it and still want your marriage. She might awake.) I believe I can and will try to forgive you no matter what happens in should this now be the end. At that time.. NO LONG discussions. Be patient.
Then 100% the 180. Begin to be independent and move on. Listen and observe.
You just gave her what her fears could not do from the beginning. A piece of your wife really wants this marriage, for whatever reason. But a piece does not. A strong stance will give you the answer you need.
A woman will make her choice to stay married or not. A maybe is a no.
What you then look for is a person who will immediately dump the OM. They will seek a refuge, not with the OM, but seek out why she did what she did. She will answer all your questions, you will know who this OM is and why she started her relationship. She will want to be honest. She will seek help, counseling, giving you an apology, asking for forgiveness, perhaps turning to God, accepting the fact she made a huge mistake and decides on her own to change. You will see it, with her own behaviors because she will want to share these with you. It will come in the form of cards, attention to you. She will not play games any more.
Be warned. The degree of the coming pain will depend on whether you both confront the situation head on or choose to avoid it. Unfortunately, many people will choose to live in limbo instead of moving forward into a more passionate and purposeful life. Limbo = misery
Peace brother.
[This message edited by trynhard at 11:50 AM, February 25th (Tuesday)]